Quark fried, blown capacitor...

[suicideneil]

Does seem like rather a large price difference for a software upgrade, but it may be because the Monster Pros are more likely to get abused and require fixing/replacing alot more often than the Airmaster version. Anyone daring enough to put on a fake accent and phone up S&T to enquire- pretend you're interested in getting some of each for your new R/C business.....